Adjusting rig after generation (Rigify)
Unfortunately my answer got ignored, but I think i did it.

I've found out that i can adjust the skeleton. But there is the need to do a few steps:
1. Apply Armature modifier.
2. Select rig, go to edit mode and adjust all you need to adjust.
3. In pose mode apply current pose as rest pose.
4. Set Armature back.

It works for me. Yeah, i still didn't get the best result, but i'm trying. Maybe i'll add more information.